Twin channel Class A/B amplifier. All valve, 50 watt RMS, channel switching head with foot switchable attenuator, valve FX loop and valve driven reverb. This amplifier sports two clean / crunch / lead channels which each have three stages of gain. Channel A has the same three band EQ as the lead channel used on the Rockerverb series. Channel B has a new shape control that scoops the mids and increases the bass and treble when turned up.This head also has a footswitchable attenuator for those really loud lead breaks. If you like the sound of the Thunderverb 200, but prefer the sound of a smaller cranked 50 watt power amp, then this is more for you.